I don't think it's a bad thing. As you say, there are alternatives to Github: Gitlab and Bitbucket being the most well known. If Gitlab and/or Bitbucket were to

I don't think it's a bad thing. As you say, there are alternatives to Github: Gitlab and Bitbucket being the most well known. If Gitlab and/or Bitbucket were to shut down I would consider it a bad thing because it would give Github a monopoly. Codeplex shutting down doesn't, because it was not particularly used (350 active project on the last month as they say).